I also have been receiving calls from this number.. It's been a woman, rather rude and aggressive, asking to speak to "the person that handles the National Grid bill." She hung up on me.

Yes, not a friendly caller to be from National Grid.The company is listed as TELEPORT COMMUNICATIONS GROUP - NY

No message left. No company ID for the number on caller ID.

Based on what Alyssa and John wrote, this might be more of the scam that I've also experienced coming door-to-door, asking to 'look at your utility bill to see if we can help you save money' --  not.

I received two robo calls with a woman's voice. I know the Do Not Call Registry does not cover companies you deal with. But these are not service calls and should be banned.

I've also been getting these calls about National Grid....the guy who called me called me back right after I told him I was busy trying to get lunch. I hung up on the jerk. When I did a reverse directory search on the number it said the number is "Conversent Communications", whatever that's supposed to be. I did not fall for whatever these people are trying to do. I just wish they would stop calling.